Male Reproductive Anatomy

(A.S.Repro.1.TM.A) Diagram 1 Taylor, Robert E., Scientific Farm Animal Production, 4th ed.

(A.S.Repro.1.TM.B) Diagram 2 Taylor, Robert E., Scientific Farm Animal Production, 4th ed.

(A.S.Repro.1.TM.C) Labels Vesicular Gland Glandular Part of Vas Deferens Prostate Gland Rectum Bulbourethral Gland Bulbospongiosus Ischiocavernosus Muscle Retractor Penis Muscle Epididymis Testis Scrotum Penis Ureter Urinary Bladder VasDeferens Sigmiod Flexure Prepuital Divirticulum Testicles Kidneys Vas Deferens Ureters Cloaca

Male Reproductive Parts of a Boar (A.S.Repro.1.TM.D) Male Reproductive Parts of a Boar Taylor, Robert E., Scientific Farm Animal Production, 4th ed.

Male Reproductive Parts of a Rooster (A.S.Repro.1.TM.E) Male Reproductive Parts of a Rooster Taylor, Robert E., Scientific Farm Animal Production, 4th ed

Levels of Organization Within an Organism (A.S.Repro.1.TM.F) Levels of Organization Within an Organism Cells – Building block of both unicellular and multicellular organisms. Tissues- A group of cells functioning together to perform an activity. Organs- Groups of two or more tissues that function together. Organ Systems- Cooperation among organs makes life function within an organism efficient.

Male Organs of Reproduction and Their Functions (A.S.Repro.1.TM.G) Male Organs of Reproduction and Their Functions The testicles – The testicles produce the sperm cells that fertilize the female’s egg. The sperm are produced in the seminiferous tubules within the testicles. Testosterone is produced here. Testosterone is the hormone that makes the appearance and behavior of a male masculine. The epididymis – This is where the sperm are stored from the testicle to mature. The scrotum – The scrotum is a sac that contains and protects the testicles. It regulates the temperature to be a few degrees lower than body temperature since sperm like this lower temperature. The vas deferens – The vas deferens transports the sperm from the epididymis to the urethra. The urethra – A large muscular canal extending from the urinary bladder. This is the pathway through with urine and semen are excreted. Accessory sex glands – The seminal vesicles, prostate, and bulbourethral glands are a part of this category. They primarily add to the semen fluid to provide health and nutrition to the sperm. The penis – The organ of copulation. It is characterized by its spongy, erectile tissue. It provides the passage way for urine and semen.

Differences in the Poultry Male Reproductive Organs (A.S.Repro.1.TM.H) Differences in the Poultry Male Reproductive Organs The testes are contained in the body cavity. Each vas deferens opens into small papillae, which are located in the cloacal wall. Male fowl have no penis but have a copulatory organ.

(Lesson 3 – Male Hormones of Reproduction TM.A) Hormones – Chemicals secreted by an animal that affect other parts of the organism.

Hormones in Male Reproduction Gonadotropic Releasing Hormone (GnRH) – Hormone that stimulates the gonads. Follicle Stimulating Hormone (FSH) – Causes production of sperm cells. Luteinizing Hormone (LH) – Causes endocrine cells in the testes to produce the male hormone – testosterone. Testosterone – The steroid hormone responsible for the growth and development of secondary sex characteristics in a male such as growth and maintenance of male sex organs and the production of sperm.

(Lesson 3 – Male Hormones of Reproduction TM.C) Hormones are secreted from glands. -Hypothalamus – Area of the brain directly above the pituitary that produces one of the hormones which control reproduction. Gonadotropic Releasing Hormone (GnRH). -Pituitary – Gland situated beneath and stimulated by the hyphalamus, releases follicle stimulating hormone (FSH) and Luteinizing hormone (LH), which serve such functions as stimulating production of sperm and testosterone in males.

(Lesson 3 – Male Hormones of Reproduction TM.D) Negative Feedback In the endocrine system, the means of self-regulation by which the body maintains correct hormone levels.

(Lesson 3 – Male Hormones of Reproduction TM.D) Negative Feedback Biggs, Kapicka, Lundgren, Biology The Dynamics of Life Copyright Glencoe/McGraw-Hill 1998.