Sexual Reproduction Flashcards
What are gametes?
Male and female sex cells
What is a Zygote?
Fertilized Egg
Which gamete is motile?
Motility Sperm-Spermatozoon
Which gamete contains nutrients?
Developing embryo;egg (ovum)
What are primary sex organs?
Produce gametes(testes or ovaries)
What are the primary sex organs for male and females?
Testes in male
Ovaries in females
What are secondary sex organs?
Organs other than the gonads that are necessary for reproduction.
What are secondary sex organs for males?
System of ducts, glands, penis deliver sperm cells
What are secondary sex organs for females?
Uterine tubes, uterus, and vagina
What secondary sex characteristics do both sexes have?
Pubic and axillary hair and their associated scent glands, and the pitch of the voice.
What secondary sex characteristics do males have?
Facial hair, course and visible hair on the torso and limbs, relatively muscular physique
What secondary characteristics do females have?
Body fat, Breast enlargement
What is the function of the scrotum?
Containing the testes
What is the function of the spermatic cord?
Bundle of fibrous connective tissue containing the ductus deferens, blood and lymphatic vessels, an testicular nerve
What role do the cremaster play in the scrotum?
In cold, contracts and draws testes upward
In warm, relaxes suspending testes further
What is creamaster muscle?
Internal abdominal oblique muscle
What is Dartos muscle?
Subcutaneous layer of smooth muscle
What role do the Dartos play in the scrotum?
Contracts when cold, wrinkling scrotum reduce heat loss
what role do interstitial cells and subtentacular cells play during the development of sperm?
Insterstitial cells- is the source of testosterone sustentacular cells-Protect the germ cells and promote their development.
The germ cells depends on substentacular cells for nutrients, waste removal, growth factors, and other needs
Describe the flow of sperm through the various structures from the seminiferous tubules until they are released during ejaculation?
Seminiferous tubules-straight tubules-Rete testis-Efferent ducts-Ductus Epididymis-Ductus (vas)Deferens
What are the three major accessory glands in the male reproductive system?
1) Seminal vesticles-Empties into ejaculatory system
2) Prostate Gland-Surround urethra and ejaculatory duct,
3) Bulbourethral Glands-Near bulb of penis
Explain the three cylindrical bodies of erectile tissue
Fills with blood during sexual arousal and account for its enlargement and erection
