The first line of defense involves surface barriers that prevent the entry of pathogens into the body. Surface barriers include the…………..and ……………………….           

If you flip a lung on its side and examine its medial or mediastinal surface (the surface that faces the mediastinum), you can see an area called the ……………. of the lung. This is an indentation where the pulmonary vessels, nerves, lymphatic vessels, and airway passages called primary bronchi enter and exit the lungs.    

……………………………….. are white blood cells that are also one of the body’s main types of immune cells. They are made in the bone marrow and found in the blood and lymph tissue. (Indicates with D)     

What is the name of the tissue and its structural unit?     

Calcitonin is made by the ………………. cells of the thyroid gland.

Mineralocorticoids regulate the concentration of ……………….. and …………………. ions in our blood.

The uterine tubes join the superolateral portion of the …………………….., which is the organ in which a fertilized ovum implants, and in which a conceptus develops. Also, it protects and sustains embryo during pregnancy.    

The urinary system is the group of organs that consists of the kidneys and the urinary tract-the ureters, urinary bladder, and ………………………-and performs many functions critical to the maintenance of homeostasis.  

Peristaltic waves push the swallowed bolus down the esophagus. In the stomach, peristalsis churns swallowed food, mixing it with gastric juices. These mechanical and chemical actions further break down food into a substance called ………….  

The pancreatic islets produce __________.