Cells in heart tissue are joined together and able to work in a coordinated fashion because of . a. tight junctions
b. gap junctions
c. extracellular matrix
d. anchoring junctions
e. microvilli

Which of the following systems in absorbing oxygen and releases carbon dioxide

Spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

Vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a.) antibody, antibiotic b.) antigen, antibody c.)antibiotic, antibody d.)antibody, antigen