Answer:
not always confined to blood vessels and is under lower pressure than in closed circulatory systems
Explanation:
In an open circulatory system, blood is not always confined to blood vessels and is under lower pressure than in closed circulatory systems. This is because an open circulatory system is a system where blood, may be directly open to the environment in various places throughout the body such as the digestive tract, as opposed to being sealed in arteries and veins. Such a system is mostly found in insects and some animals such as snails or clams.
Answer:
Moderate aerobic physical activity involves the physical activities that will result to increase heart rate and break a sweat.
Depending on the severity of the operation moderate aerobic esercise is recommended for three (intense) to five days per week.
For older adults, moderate aerobic exercise accumulate 30 minutes a day for low- pressure, it means about 150 minutes a week. Moderate aerobic exercise for adults includes brisk walking, dancing or household chores.
Hence, the intensity level of moderate aerobic exercise for older adults should be 30 minutes a day.
A forensic anthropologist examines and identifies skeletal remains.
Answer:
Challenger Deep
Explanation:
In the Pacific Ocean, somewhere between Guam and the Philippines, lies the Marianas Trench, also known as the Mariana Trench. At 35,814 feet below sea level, its bottom is called the Challenger Deep — the deepest point known on Earth.