Search results
Results from the WOW.Com Content Network
Typically, each body segment carries one pair of appendages. An appendage which is modified to assist in feeding is known as a maxilliped or gnathopod. [citation needed] In annelids lateral protrusions from the body are called parapodia. In echinoderms an appendage called a pedicellaria is found. The end of the pedicellaria consists of valves ...
In humans, some of the more common skin appendages are hairs (sensation, heat loss, filter for breathing, protection), arrector pilli (smooth muscles that pull hairs straight), sebaceous glands (secrete sebum onto hair follicle, which oils the hair), sweat glands (can secrete sweat with strong odour or with a faint odour (merocrine or eccrine ...
For example, just prior to the root hair development, there is a point of elevated phosphorylase activity. [ 13 ] Many of what scientists know about trichome development comes from the model organism Arabidopsis thaliana , because their trichomes are simple, unicellular, and non-glandular.
For example, the Scarabaeidae have lamellate antennae that can be folded tightly for safety or spread openly for detecting odours or pheromones. The insect manages such actions by changes in blood pressure, by which it exploits elasticity in walls and membranes in the funicles, which are in effect erectile.
The hind part is considerably slimmer and is made up of the sixth thoracic segment and the four legless pleonic segments. Two caudal appendages project from the rear. Although they may be difficult to observe, Cyclops has five pairs of legs. The long first antennae, two in number, are used by the males for gripping the females during mating.
A flagellate is a cell or organism with one or more whip-like appendages called flagella. The word flagellate also describes a particular construction (or level of organization) characteristic of many prokaryotes and eukaryotes and their means of motion. The term presently does not imply any specific relationship or classification of the ...
Male Zoropsis spinimana showing enlarged pedipalps. Pedipalps are composed of six segments or articles. From the proximal end (where they are attached to the body) to the distal, they are: the coxa, the trochanter, the femur, the short patella, the tibia, and the tarsus.
Compound chaetae possess a joint or hinge toward the distal end that allows a distal blade or appendage to articulate around it. Uncini are highly modified chaetae in which the shaft is reduced (or virtually absent) and the tip is broadened to create short, stout structures. These are often present in sedentary taxa.