85 results found

Search Results for: sac

Amniotic sac

Definition noun, plural: amniotic sacs Fluid-filled sac where the embryo or fetus is suspended in the uterus or in the of... Read More

Sack

sack To plunder or pillage, as a town or city; to devastate; to ravage. The romans lay under the apprehension of seeing... Read More

Conjunctival sac

Definition noun (1) A gap or space formed between the eyelids and eyeball. (2) A fornix bound by the conjunctival membrane... Read More

Sac

sac A pouch or cavity. A case or sheath especially a pollen sac or moss capsule.A structure resembling a bag in an animal.A... Read More

Angiosperm

Angiosperms Definition What is an angiosperm? An angiosperm is a plant that produces flowers. The angiosperms, also... Read More

Apomixis

Apomixis Definition Just like any other organism, the process of reproduction is pivotal to the life cycle of plants. There... Read More

Fetal membrane

Definition noun, plural: fetal membranes A membrane surrounding the embryo or fetus and is involved in nutrition,... Read More

Lacrimal gland

Definition noun, plural: lacrimal glands Either of the two almond-shaped glands in the upper lateral part of the orbit and... Read More

Bladder

Definition noun, plural: bladders (1) (anatomy) A distensible membranous sac or organ that can hold liquid or gas (2)... Read More

Amnion

Definition noun, plural: amnions The innermost membrane of the extraembryonic or the fetal membranes of amniotes surrounding... Read More

Vesicle

Definition noun, plural: vesicles (general) A small sac or cyst containing fluid or gas (cell biology) A bubble-like... Read More

Tear

Definition noun, plural: tears (physiology) The watery secretion of the lacrimal glands verb To pull (apart) by force or by... Read More

Joint capsule

Definition noun, plural: joint capsules A sac-like fibrous tissue that envelopes a synovial joint Supplement Synovial joints... Read More

Dichorionic-diamniotic twins

Definition noun Twins with separate chorions and amniotic sacs in utero Supplement Twins may be classified according to the... Read More

Amniotic fluid

Definition noun The protective fluid surrounding the developing fetus within the amniotic sac of a pregnant... Read More

Sporophyte

Sporophyte Definition What is a sporophyte? Accordingly, the sporophyte is the plant generation that produces spores. To... Read More

Bursa omentalis

Bursa omentalis --> omental bursa (Science: anatomy) An isolated portion of the peritoneal cavity lying dorsal to the... Read More

Ear

Ear 1. The organ of hearing; the external ear. in man and the higher vertebrates, the organ of hearing is very complicated,... Read More

Anamniote

Definition noun, plural: anamniotes Any of the vertebrates that do not belong to the Amniota, and in which an amnion does... Read More

Oligohydramnios

Definition noun A condition characterized by a deficiency of amniotic fluid Supplement The amniotic fluid is the fluid that... Read More

Synovial joint

Definition noun A movable joint comprised of a layer of fibrocartilage or hyaline cartilage that lines the opposing bony... Read More

Endomembrane system

Ever wondered how biomolecules are made within the cell and then they are released outside the cell for use by the body?... Read More

Tooth bud

Definition noun, plural: tooth buds An undeveloped tooth consisting of aggregates of cells organized in three organs: the... Read More

Amniote

Definition noun, plural: amniotes Any of the tetrapod vertebrates belonging to Amniota in which an amnion is formed during... Read More

Lacrimation

Definition noun, plural: lacrimations The shedding of tears; crying; tearing Supplement Lacrimation refers to the shedding... Read More

Allantois

Definition noun, plural: allantoises or allantoides An embryonic diverticulum of the hindgut of reptiles, birds, and... Read More

Pericardium

pericardium (Science: anatomy) A double membranous sac which envelops and protects the heart. The layer in contact with the... Read More

Clitellum

clitellum It is the band of glandular tissue in earthworm that secretes a viscid sac in which the eggs are deposited. Once... Read More

Twins

Definition noun, singular: twin (1) Two siblings from the same pregnancy and birth (2) (general) Two closely related and... Read More

Air bladder

Air bladder 1. (Science: anatomy) An air sac, sometimes double or variously lobed, in the visceral cavity of many fishes. It... Read More

Respiration

Organization of the Respiratory System Each lung is composed of air sacs called alveoli - the sites of gas exchange with... Read More

Circulation

Blood Blood is composed of a liquid, plasma, and blood cells such as erythrocytes (red blood cells,) leukocytes (white... Read More

Plant Cells vs. Animal Cells

Plant Cells Most cells are not visible with the naked eye. However, with microscopes of various types, plant cells can be... Read More

Seed Plants

There are two main subdivisions of seed plants—the ones without covered seeds, the gymnosperms, and the ones with covered... Read More

Follicle

Follicle 1. (Science: anatomy) Generally a small sac or vesicle. 2. (Science: botany) a kind of fruit formed from a single... Read More

Utricle

Definition noun (1) (anatomy) The part of the otolith organ found in the inner ear of vertebrates (2) (anatomy) The small... Read More

Pneumatophore

Definition noun, plural: pneumatophores (botany) A specialized aerial root, such as in certain mangrove species, that stick... Read More

Dart

Dart 1. (Science: zoology) a fish; the dace. See dace. 2. (Science: zoology) dart sac, a sac connected with the reproductive... Read More

Nucellar embryony

Definition noun A form of apomixis where a nucellar embryo arises from the diploid nucellus tissue surrounding the embryo... Read More

Cells know when to separate at mitosis

How do cells know when to separate during mitosis? A molecule called BubR1 was found to regulate the timing of the division... Read More