Facilitated Diffusion
/fəˈsɪlɪˌteɪtɪd dɪˈfjuːʒən/
The process of spontaneous passive transport of molecules across a biological membrane via specific transmembrane integral proteins.
Fascia
/ˈfæʃiə/
A thin casing of connective tissue that surrounds and holds every organ, blood vessel, bone, nerve fiber, and muscle in place.
Fascicle
/ˈfæsɪkəl/
A bundle of structures, such as nerve or muscle fibers.
Femur
/ˈfiːmər/
The bone of the thigh or upper hind limb, articulating at the hip and the knee.
Fenestration
/ˌfɛnɪˈstreɪʃən/
Small pores or openings in a biological membrane, such as those found in certain capillaries.
Ferritin
/ˈfɛrɪtɪn/
A protein produced in mammalian metabolism that serves to store iron in the tissues.
Fibrin
/ˈfaɪbrɪn/
An insoluble protein formed from fibrinogen during the clotting of blood. It forms a fibrous mesh that impedes the flow of blood.
Fibrinogen
/faɪˈbrɪnədʒən/
A soluble protein present in blood plasma, from which fibrin is produced by the action of the enzyme thrombin.
Fibroblast
/ˈfaɪbrəˌblæst/
A cell in connective tissue which produces collagen and other fibers.
Filtration
/fɪlˈtreɪʃən/
The movement of water and solutes across a cell membrane due to hydrostatic pressure from the cardiovascular system.
Fissure
/ˈfɪʃər/
A narrow split or groove that divides an organ such as the brain or liver into lobes.
Flagellum
/fləˈdʒɛləm/
A slender threadlike structure, especially a microscopic appendage that enables many protozoa, bacteria, and spermatozoa to swim.
Flexion
/ˈflɛkʃən/
The action of bending or the condition of being bent, especially the bending of a limb or joint.
Follicle-Stimulating Hormone
/ˈfɒlɪkəl ˈstɪmjʊleɪtɪŋ ˈhɔːrmoʊn/
A hormone (FSH) secreted by the anterior pituitary gland that promotes the formation of ova or sperm.
Fontanelle
/ˌfɒntəˈnɛl/
A space between the bones of the skull in an infant or fetus, where ossification is not complete and the pulsatory relay of the brain can be felt.
Foramen
/fəˈreɪmən/
An opening, hole, or passage, especially in a bone.
Fovea Centralis
/ˈfoʊviə sɛnˈtreɪlɪs/
A small depression in the retina of the eye where visual acuity is highest.