B) Only as prescribed by a medical professional
Answer:
Umbilical cord
Explanation:
Allantois is a hollow sac like structure. Its primary role is to eliminate liquid waste from the fetus and help in exchange of gases. Amniote is the group of organisms which contain allantois, amnion and chorion. Reptiles, birds and mammals are part of this group.
In mammals, allantois develops into umbilical cord. Umbilical cord is present between the fetus and the placenta. Human umbilical cord has two arteries and one vein. The vein brings nutrient rich, oxygenated blood from the placenta to fetus. The arteries brings back nutrient depleted, deoxygenated blood to placenta.
Answer:
The correct answer would be B, according to your ability, health, and the risk associated with the exercise.
Explanation:
As people get older, their bodies become more weak and fragile. Especially after 60. It's important to keep your body healthy at an older age without overdoing it and injuring yourself.
One of the best ways to increase physical activity is through <u>Walking</u> because it does not require special facilities or expensive equipment and is the most popular form of activity among those who meet the U.S. government's recommended exercise goals.
Physical activity decreases the risk of disease and increases well-being. Most people are engaged in physical activities that require gym facilities and other equipment. Physical activities other than the gym which do not require skills and equipment are - walking, running, jogging, etc., are more beneficial to all groups of children and old adults. Daily walking can reduce the risk of heart disease, hypertension, anxiety, and blood pressure and improves memory, stamina also improves quality of life.
Learn more about Physical activities here,
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