Males External Genital

Question 1

Root of penis

Answer 1

The fixed portion that attaches the penis to the body wall

This connection occurs within the urogenital triangle immediately inferior to the pubic symphysis

Question 2

Glans penis

Answer 2

The expanded distal end that surrounds the external urethral orifice

Question 3

Neck

Answer 3

The narrow portion of the penis between the shaft and the glans penis

Question 4

Prepuce or foreskin

Answer 4

Surrounds the tip of the penis

Attaches to the neck of the penis and continues over glans penis

Question 5

Preputial glands

Answer 5

In the skin of the neck and the inner surface of the prepuce

secrete a waxy material called smegma

Question 6

Most of the body of the penis consist of three cylindrical columns of erectile tissue

Answer 6

Erectile tissue consists of a three-dimensional maze of vascular channel in completely separated by partition of elastic connective tissue and smooth muscle fibers

Question 7

How does erection occur

Answer 7

1. Parasympathetic innervation of the penile arteries involves neurons that release nitric oxide at their axon terminals.
2. The smooth muscles in the arterial walls relax when nitric oxide Is released.
3. Vessels dilate, blood flow increases, and the vascular channel become engorged with blood

Question 8

Corpora cavernosa

Answer 8

1. Two cylindrical masses of erectile tissue.
2. On the anterior surface of the flaccid penis
3. Diverge at their base forming the crura of the penis
4. Extends along the length of the penis as far as its neck
5. The erectile tissue within each corpus cavernosum surround a central artery of the penis

Question 9

Crura

Answer 9

Each Crus is bound to the Ramus of the Iscium and pubis symphysis by tough connective tissue ligaments

Question 10

Corpus spongiosum

Answer 10

1. Surrounds the penile urethra
2. This erectile body extends from the superficial fascia of the urogenital diaphragm to the tip of the penis, Where it expands to form the glans penis
3. The surrounding sheeth contains more elastic fibers than does that of the corpora cavernosa