Answer:
d
Explanation:
Your heart is an organ that’s largely made up of muscle. It has the vital function of working to pump blood to the organs and tissues of your body.
C it’s the answer for you
Answer:
True
Explanation:
The lumen of a blood vessel helps determine blood pressure as blood flows through lumen and bp is measured in the lumen of artery
D so that bacteria doesnt multiply in the grains since moisture favours them
Answer:
tracheae
instead of lungs, insects breathe with a network of tiny tubes called tracheae
