Today we discussed the anatomy of the Cardiovascular system and the Respiratory system, which sometimes get lumped together as the Cardiopulmonary system. Arteries carry blood away from the heart and operate at much higher pressure than veins, which carry blood toward the heart. Crash Course on Circulation and Respiration.
Remember codominance? Human blood types are a great example of multiple alleles being expressed at the same time. For more about blood, such as what makes a blood type and how the red cells carry oxygen, check out this video from Crash Course A&P.
Remember codominance? Human blood types are a great example of multiple alleles being expressed at the same time. For more about blood, such as what makes a blood type and how the red cells carry oxygen, check out this video from Crash Course A&P.