Poultry Production Basics: Chicken Reproduction and Egg Formation (Part 4)
Explore “Chicken Reproduction and Egg Formation” in this Poultry Production Basics lesson. Part 4 of the five-part series brings together the source material and lesson topics. Use the contents links to find a section, read the notes, and consult the complete original teaching slides below.
Lesson topics
- Species | Adult | | Young |
- REPRODUCTIVE STRUCTURES OF CHICKEN
- From each tubule arises the vas deferens(the storage place for the spermatozoa).
- Sperms undergo maturation in the epididymis and attain the power of motility here.
- FEMALE REPRODUCTIVE SYSTEM
Contents
- Read the original document
- Species | Adult | | Young |
- REPRODUCTIVE STRUCTURES OF CHICKEN
- From each tubule arises the vas deferens(the storage place for the spermatozoa).
- Sperms undergo maturation in the epididymis and attain the power of motility here.
- On the ventral portion of the cloaca is a small button-like structure called copulatory papilla, which is
- FEMALE REPRODUCTIVE SYSTEM
- OVARY AND OVIDUCT
- The oviduct is a long zig zag tube consisting of glandular and muscular parts .
- Infundibulum:
- About 33 cm in the laying hens is the largest portion and albumen-secreting region of the oviduct.
- Uterus (shell gland)
- EGG FORMATION AND STRUCTURE
- Two shell membranes are laid down around the albumen as it passes through the isthmus.
- The oviposition or laying of egg, is through the contraction of uterus.
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Read the original source document
Introduction to Poultry Production: original teaching slides for this study series.
Species | Adult | | Young |
Species | Adult | | Young | | Male | Female | 0-8 W | 9-18 W Chicken | Cock | Hen | Chick | M:CockerelF:Pullet Duck | Drake | Duck | M:Drakeling F:Ducklet | Goose | Gander | Goose | Goosling | Goosling Turkey | Tom Turkey | Turkey hen | Poult | Poult
Species | Adult | | Young |
Species | Adult | | Young | | Male | Female | 0-8 W | 9-18 W Quail | Quail Cock | Quail Hen | Quail Chick | Quail Guinea Fowl | Guinea Fowl | Guinea Fowl | Keet | Keet Pigeon | Pigeon | Pigeon | Squab | Squab
REPRODUCTIVE STRUCTURES OF CHICKEN
REPRODUCTIVE STRUCTURES OF CHICKEN MALE REPRODUCTIVE STRUCTURES Male reproductive structures include testes, vas deferens, cloaca and the rudimentary copulatory organ. FUNCTIONS Testes are paired, small ovoid structures lying on the dorsal body wall, on either side of the vertebral column and anterior to the kidneys. The testes are reddishyellow in colour.
From each tubule arises the vas deferens(the storage place for the spermatozoa).
The testis is formed of numerous slender seminiferous tubules, inside which spermatogenesis takes place. From each tubule arises the vas deferens(the storage place for the spermatozoa). The epididymis of each side continues down as the vas deferens and terminates in the cloaca. Puberty in a cockerel (immature male) is defined as the age when spermatozoa first appear in ejaculated semen.
Sperms undergo maturation in the epididymis and attain the power of motility here.
Sperms undergo maturation in the epididymis and attain the power of motility here. The sperms are carried down with the seminal secretion into the cloaca from where they are discharged during copulation. Daily sperm output in cocks is about 2000×10 6 while in toms (turkey male) it is about less than 1120×106.
On the ventral portion of the cloaca is a small button-like structure called copulatory papilla, which is
On the ventral portion of the cloaca is a small button-like structure called copulatory papilla, which is the rudimentary copulatory organ. During copulation the papilla of male and female are everted and pressed together so that sperms are ejected directly into the female urodeum, from where they are squeezed into the oviduct by the contraction of the urodeum (the middle part of the cloaca).
FEMALE REPRODUCTIVE SYSTEM
FEMALE REPRODUCTIVE SYSTEM The female reproductive system consist of Ovary and Oviduct. At the time of early embryonic development, two ovaries and two oviducts exist. But the right set atrophies, leaving only the left ovary and oviduct.
OVARY AND OVIDUCT
OVARY AND OVIDUCT The left ovary is situated at dorsal part of abdominal cavity and the fore end of kidneys. The ovary is responsible for the formation of yolk only.
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The oviduct is a long zig zag tube consisting of glandular and muscular parts .
The oviduct is a long zig zag tube consisting of glandular and muscular parts . Oviduct extends from the ovary to the cloaca. It has 5 distinct parts: 1. Infundibulum (9cm) 2. magnum (33cm), 3. isthmus (10cm), 4. uterus (10-12cm) 5. vagina (12cm)
Infundibulum:
Infundibulum: is the funnel-shaped, anterior portion of the oviduct, and measures about 9 cm in the laying hens. It is where fertilization takes place. The mature ovum immediately after release from the graffian follicle, is engulfed by the infundibulum, and remains there for about 30 minutes before moving to the magnum.
About 33 cm in the laying hens is the largest portion and albumen-secreting region of the oviduct.
About 33 cm in the laying hens is the largest portion and albumen-secreting region of the oviduct. The ovum remains in the magnum for about 2 hrs and 54 min. Shell membranes are secreted and egg gets its shape in this region. The ovum stays in isthmus for about 1 hour and 14 minutes.
Uterus (shell gland)
Uterus (shell gland) Is a pouch-like structure, it is where the egg shell is added and pigmented The ovum stays here for about 20 hours and 40 minutes in the uterus. is the terminal portion of the oviduct having a muscular sphincter at the utero-vaginal junction which helps in expelling the egg during oviposition.
EGG FORMATION AND STRUCTURE
EGG FORMATION AND STRUCTURE PROCESS OF EGG FORMATION The yolk is not the true reproductive cell, but a source of food material from which the live cell (blastoderm) and its resultant embryo partially receives its nutrients for growth. Approximately 25 to 26 hours is required from the time an oocyte is released from the ovary till the egg is released from the body.
Two shell membranes are laid down around the albumen as it passes through the isthmus.
The infundibulum helps in egg transport and is the site of fertilization; has no role in egg formation. The magnum secretes and stores albumen before the egg formation and releases the albumen as the ovum passes. Two shell membranes are laid down around the albumen as it passes through the isthmus.
The oviposition or laying of egg, is through the contraction of uterus.
The shell gland; it is made up of calcium carbonate (98%) and glycoproteins (2%); contains pores to allow gas exchange. Outside the shell is a proteinaceous layer – cuticle, which blocks bacterial entry. The oviposition or laying of egg, is through the contraction of uterus. The hormones responsible for uterine contraction and oviposition are oxytocin and vasotocin released from the posterior lobe of pituitary.
Review questions and answers
What are the key points about Species | Adult | | Young |?
Species | Adult | | Young | | Male | Female | 0-8 W | 9-18 W Chicken | Cock | Hen | Chick | M:CockerelF:Pullet Duck | Drake | Duck | M:Drakeling F:Ducklet | Goose | Gander | Goose | Goosling | Goosling Turkey | Tom Turkey | Turkey hen | Poult | Poult
What are the key points about REPRODUCTIVE STRUCTURES OF CHICKEN?
REPRODUCTIVE STRUCTURES OF CHICKEN MALE REPRODUCTIVE STRUCTURES Male reproductive structures include testes, vas deferens, cloaca and the rudimentary copulatory organ. FUNCTIONS Testes are paired, small ovoid structures lying on the dorsal body wall, on either side of the vertebral column and anterior to the kidneys. The testes are reddishyellow in colour.
What are the key points about From each tubule arises the vas deferens(the storage place for the spermatozoa).?
The testis is formed of numerous slender seminiferous tubules, inside which spermatogenesis takes place. From each tubule arises the vas deferens(the storage place for the spermatozoa). The epididymis of each side continues down as the vas deferens and terminates in the cloaca. Puberty in a cockerel (immature male) is defined as the age when spermatozoa…
What are the key points about Sperms undergo maturation in the epididymis and attain the power of motility here.?
Sperms undergo maturation in the epididymis and attain the power of motility here. The sperms are carried down with the seminal secretion into the cloaca from where they are discharged during copulation. Daily sperm output in cocks is about 2000×10 6 while in toms (turkey male) it is about less than 1120×106.
What are the key points about On the ventral portion of the cloaca is a small button-like structure called copulatory papilla, which is?
On the ventral portion of the cloaca is a small button-like structure called copulatory papilla, which is the rudimentary copulatory organ. During copulation the papilla of male and female are everted and pressed together so that sperms are ejected directly into the female urodeum, from where they are squeezed into the oviduct by the contraction of the…
More lessons from this document
- Introduction to Poultry Production — Part 1
- Introduction to Poultry Production — Part 2
- Introduction to Poultry Production — Part 3
- Introduction to Poultry Production — Part 4
- Introduction to Poultry Production — Part 5
Conclusion
The important points in FEMALE REPRODUCTIVE SYSTEM should be reviewed alongside the definitions, examples and comparisons given above. Continue with the other four articles to cover the rest of the source material.