The human heart consist of four valves. One of these is the mitral valve which connects the left atrium to the left ventricle. During diastole, it opens to allow blood from the left atrium to flow to the left ventricle. But during ventricular systole, it closes to prevent backflow of blood back to the left atrium.
The "ins" and "outs" of school-age social relationships can be accommodated by having a Democratic<span> style of organization for your school-age program.</span>
Answer:
True
Explanation:
B cells- differentiate into plasma cells when activated, antibody mediated immunity, IgG and IgM formation in the secondary immune response. This is why i believe it is true
Answer: Metaplasia
Explanation: The process of substituting cells in the trachea with cells that can survive the harsh effect from smoking. This process is called Metaplasia.
Metaplasia is a form of Cellular adaptation process, which initiate response to different types of stimuli and adverse changes in the environment.
Metaplasia involves changing epithelial cells (which lines all the body parts) to another cells that can resist the adverse effects from the extrinsic environment.
C. Obesity
Obesity is a common risk factor between type 2 diabetes and coronary heart disease.
