Answer: peristalsis
Explanation:
The ureters are the tubes that are composed of smooth muscle fibers these tubes propel urine from the kidneys into the urinary bladder. This process is called ureteral peristalsis. In ureter peristalsis, the smooth muscle contraction occurs in the ureter tubes this way the urine is transferred at a constant speed towards the bladder.
In adults, the length of the ureter is 25-30 cm and it is diameter is 3-4mm. The ureter is one of the essential organs of the urinary tract that controls the transport of urine.
Answer:
On Humans.
People exposed to high enough levels of
certain air pollutants may experience:
Irritation of the eyes, nose, and throat
Wheezing, coughing, chest tightness, and breathing difficulties
Worsening of existing lung and heart problems, such as asthma
Increased risk of heart attack
<u>On </u><u>Environment</u>
<em>Acid rain </em>
<em>Eutrophication</em>
<em>Haze</em>
Answer:
Eighth week of pregnancy
Explanation:
At the end of the 8th week after fertilization (10 weeks of pregnancy), the embryo is considered a fetus.
