Question

the area of a right triangle is 90 cm². the two sides containing the right angles are 15 cm and 6 cm.
True
False​

Answer 1

Answer:

Almost all multicellular organisms need a circulatory system to transport oxygen and nutrients through the body. Evolution has led to the existence of two types of circulatory systems namely:

Open circulatory system: primarily found in invertebrates. Here, the blood flows freely through cavities since there are no vessels to conduct the blood.

Closed circulatory system: is found in vertebrates and a few invertebrates like earthworms. This system has vessels that conduct blood throughout the body.

Step-by-step explanation: