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Pinna

Biology Pineal glandPinocytosis

pinnately compound -- Leaves which are divided up like a feather are said to be pinnately compound.
pistil -- The central set of organs in a flower; it is composed of one or more carpels. More info?

 


pinna
1. the primary division of a leaf. 2. a wing or fin. 3. the projecting part of the external ear of mammals.
pistil
The flask-shaped female reproductive unit of a flower, composed of ovary, style, and stigma.

Pinnate-netted, penniribbed, penninerved, penniveined; the leaf has usually one main vein (called the mid-vein), with veinlets, smaller veins branching off laterally, usually somewhat parallel to each other; eg Malus (apples).

pinna The external ear. Also a feather, wing, or fin or similar part.
pinnate Denoting an arrangement of leaflets (or lobes on a simple leaf) along a main central unit.
pinnately compound leaf Leaflets attached on both sides of a common axis.

In pinnate muscles, however, only a portion of the strength of contraction is efficient in the direction of the tendon, since a portion of the pull would tend to draw the tendon to one side, this is mostly annulled by pressure of surrounding parts.

long, pinnately compound megaphyll leaves with a leathery feel arising from soft woode4d stems by circinnate vernation; new leaves arise as a crown or whorl; reproduction by seeds produced in female cones, pollen produced in male cones ...

Any slender, pointed object, like a needle, as a pointed crystal, a sharp pinnacle of rock, an obelisk, etc. Dipping needle. See Dipping. Needle bar, the reciprocating bar to which the needle of a sewing machine is attached.

About 30,000 federal and state judges, representing the pinnacle of the government's authority, want to dispense justice through fair trials. The definitive power is the ability of the state to take the life of a person convicted of a capital crime.

Elastic cartilage (also called yellow cartilage) is found in the pinna of the ear and several tubes, such as the walls of the auditory and eustachian canals and larynx. Cartilage is present to keep the tubes permanently open.

Cycads retain some fern-like features, notably pinnate leaves and circinate vernation. However, they (usually) produce cones of nonphotosynthetic reproductive structures.

The popular notion that evolution can be represented as a series of improvements from simple cells, through more complex life forms, to humans (the pinnacle of evolution), can be traced to the concept of the scale of nature. This view is incorrect.

See also: Trans, Tissue, Organ, Class, Human