B. Placenta (works with the umbilical cord to provide nutrients to the developing human)!
Answer: I think its C because it'll keep his blood flowing normal, hopefully this helps.
Explanation:
Answer:
The correct answer will be option-C
Explanation:
In an organism, the mechanism of gas exchange depends on the partial pressure and total pressure of the gas. Partial pressure is the pressure of the gas exerted by a single type of gas in a mixture of gases and this pressure determines the movement of gases in the system.
The diffusion of the oxygen from the alveoli to blood capillaries depends on the partial pressure as the partial pressure of oxygen is high in alveoli measured about 104 mmHg compared to the capillaries measured about 40 mmHg.
This difference in the pressure generates pressure gradient which leads to the movement of the oxygen from alveoli to the capillaries as the movement takes place from higher to lower concentration gradient.
Thus, Option-C is the correct answer.
Answer:50
Explanation:Erectile dysfunction (ED) is defined as persistent difficulty achieving and maintaining an erection sufficient to have sex. Causes are usually medical but can also be psychological. Organic causes are usually the result of an underlying medical condition affecting the blood vessels or nerves supplying the penis.
Occurs when a man can't get or keep an erection firm enough for sexual intercourse.
Treatable by a medical professional
Usually self-diagnosable
Lab tests or imaging rarely required
Chronic: can last for years or be lifelong
Erectile dysfunction can be a sign of a physical or psychological condition. It can cause stress, relationship strain and low self-confidence.
It would be choice A (Tolerance)
Hope this helps!!
