The horseshoe crab has 6 pairs of appendages on the posterior side of the prosoma. Five pairs of walking legs or pedipalps enable the horseshoe crab to easily move along benthic sediments. Each has a small claw at the tip except the last pair. The last pair of legs has a leaflike structure at the terminal end that is used for pushing and clearing away sediments as the crab burrows into marine bottom.
The base of each leg is covered with inward pointing spines called gnathobases that move food towards the mouth located between the legs. As the legs are moving, food is crushed and macerated. There are also 2 small chelicera appendages that help guide food into the mouth.
Several distinct variations between males and females occur in horseshoe crabs. Upon reaching maturity at 9-10 years old, the female horseshoe crab will molt an additional one or two more times. As a result, the female crab is considerably larger than the male. Also, the mature male horseshoe crab will develop a modified first pair of walking legs. The new legs (adapted pedipalps) have a hooklike structure that resembles a boxing glove. The male horseshoe crab uses the modified legs to clasp onto the shell of the female during spawning.
The gray tree frog's color changes in response to its environment and activities, and can range from green to gray or brown. The upper surface of the body has a blotchy pattern that resembles lichen. Although the pattern varies, it usually features two dark central patches, which can be green, buff or gray. These frogs have a white spot beneath each eye and a dark stripe from the rear of the eyes to the front of the legs. The snout is short, and the skin is warty and coarse.
The upper surfaces of the legs feature a dark, banded pattern, which contrasts starkly with the bright yellow or orange undersides of the legs. Scientists believe the bright coloration serves as a warning for predators not to attack. The gray tree frog has webbed hands and feet. The enlarged tip of each digit produces an adhesive fluid that allows this species to better grip trees and improves its climbing abilities. The frog's belly is white, although the male reveals a black throat when it is calling.
The individuals engage in amplexus, a mating position in which the male grasps the female with his front legs, as the female deposits 1,000 to 2,000 eggs which are externally fertilized by the male. Since mating occurs while the frogs are floating in water, eggs are deposited into the water in small clusters, which attach themselves to structures via a transparent, mucous outer layer.
Flamingo young are born white, with soft, downy feathers and a straight bill. The bill gradually curves downward as the flamingo matures. Both parents take care of the newborn flamingo, feeding it a fluid produced in their digestive systems. The young leave the nest after about five days to join other young flamingos in small groups, returning to the parents for food. The parents identify their chick by its voice. After about three weeks, the adults herd young flamingos into large groups called crèches where they start to look for food on their own.
These three stages in the development of the step can be observed in every baby that starts to walk. However, the duration of each stage may vary greatly, lasting anywhere from a few days to several weeks. Also, the control of the arms may develop at different rates from that of the legs. For example, the arms may be in an advanced stage (down alongside the body), and the legs may be in stage i or ii, and vice versa.
In the gait of autistic children, the deviations from the normal can be categorized as follows. (i) Asymmetry: In normal walking, the movements involving the arms and legs are symmetrical. In every autistic child we have seen so far, some degree of asymmetry has been found. For example, when walking, a 10-year-old girl held the right arm in a more infantile position (lower arm held at waist height, as described above) while the left arm was held downward as it swung alongside the body. When walking, a 3-year-old boy exhibited an infantile pattern in the right leg, where only the thigh was moving, carrying the lower leg and the foot with it. The other leg showed a more mature pattern; that is, all parts of the leg moved relative to one another, the heel of the foot being placed on the ground first.
Pubic lice usually are found in the genital area on pubic hair; but they may occasionally be found on other coarse body hair, such as hair on the legs, armpits, mustache, beard, eyebrows, or eyelashes. Pubic lice on the eyebrows or eyelashes of children may be a sign of sexual exposure or abuse. Lice found on the head generally are head lice, not pubic lice.
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