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Back aperture

Back aperture (Science: microscopy) The exit pupil of a microscope objective lens. The objective lens back aperture, which... Read More

Definition

Aperture

Aperture (Science: physics) The opening in an optical system which restricts the size of the bundle of rays incident on a... Read More

Definition

Synapsid

Any member of the Synapsida clade of animals is referred to as a synapsid. They are believed to have descended from the... Read More

Definition

Labia

Labia Definition Often, when persons think of the female reproductive system, they think of the vagina. However, the female... Read More

Definition

Function

Definition noun, plural: functions (biology) The special, normal, proper physiologic activity of a body part or an... Read More

Definition

Pupillary light reflex

Definition noun, plural: pupillary light reflexes A reflex marked by the constriction of the pupil in response to the... Read More

Definition

External os

Definition noun A small, somewhat circular aperture on the extremity of the extocervix Supplement At the lower part of the... Read More

Definition

Apertura mediana ventriculi quarti

Apertura mediana ventriculi quarti median aperture of fourth ventricle: a deficiency in the lower portion of the roof of the... Read More

Definition

Lamellae

Definition noun, singular: lamella (general) Thin structures resembling a plate. (cell biology) Intergrana thylakoids, i.e.... Read More

Definition

Reproductive system

What is the Reproductive System? The reproductive system of an organism is the biological system made up of all the... Read More

Definition

Costal arch

Costal arch That portion of the inferior aperture of the thorax formed by the articulated cartilages of the seventh to tenth... Read More

Definition

Pelvic inlet

pelvic inlet --> superior pelvic aperture The upper opening of the true pelvis, bounded anteriorly by the pubic symphysis... Read More

Definition

Apertura thoracis superior

Apertura thoracis superior --> superior thoracic aperture The upper boundary of the bony thorax composed of the first... Read More

Definition

Depth of field

Depth of field (Science: microscopy) The depth or thickness of the object space that is simultaneously in acceptable... Read More

Definition

Foramen

Definition noun, plural: foramina, foramens Any opening or perforation, orifice or fenestra, especially through a bone, and... Read More

Definition

Fauces

Fauces 1. (Science: anatomy) The narrow passage from the mouth to the pharynx, situated between the soft palate and the base... Read More

Definition

Airy disk

Airy disk (Science: microscopy) The image of a bright point object as focused by a lens system. With monochromatic light, it... Read More

Definition

Pupil

pupil 1. A youth or scholar of either sex under the care of an instructor or tutor. Too far in years to be a pupil now.... Read More

Definition

Stigma

stigma The pollen-receptive surface of a carpel or group of fused carpels, usually sticky. The apical end of the style where... Read More

Definition

Lip

Lip 1. One of the two fleshy folds which surround the orifice of the mouth in man and many other animals. In man the lips... Read More

Definition

Orifice

Definition noun, plural: orifices An opening or aperture; any external opening in the body of an animal. Supplement In a... Read More

Definition

Coverslip

Coverslip (Science: microscopy) thin glass, plastic, sapphire, SiO, NaCl, etc. Shaped into circles, squares, or rectangles... Read More

Definition

Vent

vent To snuff; to breathe or puff out; to snort. Origin: Cf. F. Venter to blow, vent wind (see Ventilate); but prob... Read More

Flowers and tiny fruits of the pomegranate plant

Tutorial

Fruits, Flowers, and Seeds

Flowering plants grow in a wide variety of habitats and environments. They can go from germination of a seed to a mature... Read More

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