An abnormal but not malignant cell seen in some cytologic specimens obtained during Papanicolaou tests Pap tests. The cell at which a signal e. The epithelial cells that form the internal scaffolding of the thymus. These two sperm cells are housed within pollen grains, which act as a vehicle to deliver the sperm cells to the female sex cells within a flower. Epithelial cells are closely packed and take on polyhedral shapes, from tall columnar through squat cuboidal to flat squamous.
They are cuboidal when not under pressure, and they become flattened and squamous when stretched.
How are sex cells formed
Either of two types of cell found in the bottom layer of the olfactory epithelium; one type is a flattened "basal cell proper", and the other is a rounded stem cell called a globose cell. A cell from the inner cell mass of the blastocyst the day old mammalian embryo that can give rise to all the somatic cells of the body. Meiosis produces our sex cells or gametes eggs in females and sperm in males. Sign up for our email newsletter. It is an immortal cancer cell that has been maintained in continuous tissue cultures for decades from a patient with carcinoma of the cervix. A cell of reticular connective tissue. How do you get enough variation between gametes for evolution to act, without building up mutations that will impair an organism made from those gametes?