Physical and function unit
There are two main organs:
Kidney: purify blood from toxins, and harmful chemicals and excretes them from the body in the form of urine.
Liver: inactivates and filters toxins from the bloood and removes toxic substances that have been ingested, such as food additives, harmful minerals, toxic medications, excess hormones.
Answer:
Oils repel water, so it helps these animals keep their fur dry, which helps them stay warm.
Muscle contraction is the activation of tension-generating sites within muscle fibers. In physiology, muscle contraction does not necessarily
