Answer:
b. False
Explanation:
The umbilical vein carries oxygen rich blood from the placenta to the fetus. The umbilical artery carries deoxygenated blood from the fetus to the placenta.
Anatomical and physiological barriers provide the crucial first line of defense against pathogens. These barriers include intact skin, vigorous mucociliary clearance mechanisms, low stomach pH and bacteriolytic lysozyme in tears, saliva and other secretions.
Answer:
Cell membrane
Explanation:
It covers us, keep stuff in and out.
Answer:
To become a veterinarian you'll need to complete a four-year undergraduate degree and earn a Doctor of Veterinary Medicine degree. This degree is commonly abbreviated as a DVM or a VMD, and it takes four years to earn.
Explanation:
