10. An ovum (plural ova , from the Latin word Ovum meaning egg or egg cell) is a haploid female reproductive cell or gamete .
11. Epithelia are formed of cells that line the cavities in the body and also cover flat surfaces .
12. A neuron (also known as a neuron or nerve cell ) is an electrically excitable cell that processes and transmits information by electrical and chemical signaling.
13. Adipocytes , also known as lipocytes and fat cells, are the cells that primarily compose adipose tissue, specialized in storing energy as fat.
14. Red blood cells (also referred to as erythrocytes ) are the most common type of blood cell and the vertebrate organism's principal means of delivering oxygen (O 2 ) to the body tissues via the blood flow through the circulatory system.
15. Spirogyra is a genus of filamentous green algae of the order zygnematales named for the helical or spiral arrangement of the chloroplasts that is diagnostic of the genus.
16. The term sperm is derived from the Greek word sperma (meaning "seed") and refers to the male reproductive cells.
17. Amoeba (sometimes amœba or ameba , plural amoebae ) is a genus of Protoza .
