The cardiovascular system is composed of which of the following?

lungs, blood vessels, and heart

heart, lungs, and brain

heart, blood, and blood vessels

heart, arteries, and veins

Glucose is a form of sugar found in the blood cells use glucose as a source of energy, but too much or too little can cause serious health issues so, the body uses the hormone insulin to regulate glucose n the blood insulin maintain glucose levels in the blood if blood glucose lovels got very high, what would you expect to see happen to insulin levels?

Methane gas created by a cows flatulence especially in a large herd is a greenhouse gas. true or false.

Which type of organism is a caterpillar