Hypothalamus and pituitary glands are two endocrine glands that are made of a mixture of nervous and epithelial tissues. The endocrine system is made up with a series of glands located around the body. These glands includes the pituitary gland, thyroid glands, parathyroid glands, thymus, pancreas adrenal glands among others. Each of the glands produces hormones, which have a specific function in the body.
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Chlorophast allows plants to capture the energy of the sun.
Cells know how to differentiate through a process called gene expression. It’s a specific combination of genes that are turned on and off.