THE PELVIC REGION: THE MALE AND FEMALE REPRODUCTIVE SYSTEMS 1. What do sperm cel
ID: 3512554 • Letter: T
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THE PELVIC REGION: THE MALE AND FEMALE REPRODUCTIVE SYSTEMS 1. What do sperm cells have that will propel them through the male reproductive system and what is on the inside lining of the uterine tubes that are designed to propel the egg through the uterine tubes? Egg cells: 2. Which gland produces the most nutrients for the sperm cells? 3. What passes through the center of the corpora cavernosa and what passes through the center of the corpora spongiosum? a. Corpora cavernosa b. Corpora spongiosum Which tissue of the penis expands in such a manner to result in an erection? 4.Explanation / Answer
1. The sperm is made up of the head, mid piece and tail. The tail is a flagellum that is responsible for helping the sperm to propel itself through the male reproductive tract. It has an axoneme and is formed by microtubules originating from the centriole at the base of the sperm nucleus. The axoneme has a “9 + 2” arrangement of the microtubules. Dynein present associated with microtubules has ATPase which provides the energy for the force of propulsion.
The fallopian tube has finger like projections that help to catch the egg from the ovaries. In order to propel the egg through the uterine tubes (fallopian tube), cilia and smooth muscle contraction are involved. Cilia are present on the inner lining of epithelial cells.
Sperm cells: Flagella Egg cells: Cilia (and smooth muscle contraction)
2. The male reproductive tract has accessory glands, the seminal vesicles, the Cowper’s (Bulbourethral) gland, and the prostate gland. The seminal vesicles produce the seminal fluid, which is rich is fructose sugar. It provides 60% of the seminal fluid. Fructose provides the energy to sperm for movement. It also has proteins, citric acid, inorganic phosphorus, potassium, and prostaglandins. Prostaglandins help in smooth muscle contractions.
Right option is Seminal Vesicle.
3. The penile shaft is composed of 3 columns, the 2 corpora cavernosa and the corpus spongiosum along with the fascial layers, nerves, lymphatics, and blood vessels. The cavernous (deep) arteries of the pen-s runs in the center of each corpora cavernosa. The deep arteries emits many helicine arteries (Aa heliciniae) into the caverns of the corpus cavernosa. They supply blood to the erectile tissue of the pen-s.
The corpus spongiosum is present in the ventral groove between two corpus cavernosa. In the central portion of the corpus spongiosum, the urethra is present. Urethra is a common passage for sperm and urine.
Corpora cavernosa- Deep arteries
Corpora Spongiosum- urethra
4. The sponge like penile erectile tissue (the cavernous smooth musculature and the smooth muscles of the arteriolar and arterial walls), are the tissues involved in the erectile process. In the flaccid state, smooth muscled contract tonically. Thus, there is only small amount of arterial flow for nutritional purposes. During stimulation, there is release of neurotransmitters that stimulate the cavernous nerve termini. As a result, there is dilation of arteries and arterioles. The incoming blood is trapped due to expansion of the sinusoids. The subtunical venular plexus compresses to reduce venous outflow. The tunica, now stretches to its maximum capacity. The venous outflow is now to a minimum. An increase in P02 to around 90 mmHg and intracavernous pressure to 100 mm Hg cause the pen-s to reach the erect state.
Right option is erectile tissue.
As per Chegg, we cannot use the word “pen-s”. The missing letter is this word is “I”
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