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Chapter 1: Major Themes in Anatomy and Physiology
Chapter 2: Matter and Energy
Chapter 3: The Molecules of Life
Chapter 4: Cellular Form and Function
Chapter 5: Genetics and Cellular Function
Chapter 6: Histology
Chapter 7: The Integumentary System
Chapter 8: Bone Tissue
Chapter 9: The Skeletal System
Chapter 10: Joints
Chapter 11: The Muscular System
Chapter 12: Muscular Tissue
Chapter 13: Nervous Tissue
Chapter 14: The Central Nervous System
Chapter 15: The Peripheral Nervous System and Reflexes
Chapter 16: Sense Organs
Chapter 17: The Endocrine System
Chapter 18: The Circulatory System: Blood
Chapter 19: The Circulatory System: The Heart
Chapter 20: The Circulatory System: Blood Vessels and Circulation
Chapter 21: The Lymphatic and Immune Systems
Chapter 22: The Respiratory System
Chapter 23: The Urinary System
Chapter 24: Water, Electrolyte, and Acid-Base Balance
Chapter 25: The Digestive System
Chapter 26: Nutrition and Metabolism
Chapter 27: The Male Reproductive System
Chapter 28: The Female Reproductive System
Chapter 29: Human Development
Chapter 27: The Male Reproductive System
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Recall Test
Under the influence of androgens, the embryonic
mesonephric
duct develops into the male reproductive tract.
Spermatozoa obtain energy for locomotion from
fructose
in the semen.
The
pampiniform plexux
, a network of veins in the spermatic cord, helps keep the testes cooler than core body temperature.
All germ cells beginning with the
secondary spermatocytes
are genetically different from the rest of the body and therefore must be protected by the blood-testis barrier.
The corpora cavernosa as well as the testes have a fibrous capsule called the
tunica albuginea
.
Over half the semen consists of secretions from a pair of glands called the
seminal vesicles
.
The blood-testis barrier is formed by tight junctions between the
sustentacular
cells.
The earliest haploid stage of spermatogenesis is the
secondary spermatocytes
.
Erection of the penis results when nitric oxide causes dilation of the
deep
arteries of the penis.
The
acrosome
of a sperm contains enzymes used to penetrate the egg.
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