Transcript bio projectx

Wolf spiders are members of the family Lycosidae, in the spider order Araneae, in
the class Arachnida.
There are about 125 species that are found in the United States and about 50
species that are found in Europe. A full grown wolf spider is a half an inch to two
inches. They are usually brown or gray with various stripe-like markings on their
backs, they are also usually very hairy. They have 4 small eyes in the bottom row, 2
large eyes in the middle row, and 2 medium eyes on the top row. They have short
legs.
Wolf Spiders eat a variety of things like, Crickets, other spiders, ants,
grasshoppers, flies, mosquitoes, beetles, lizards and frogs.
Once a wolf spider captures its prey, it injects venom into its prey by using its
fang-like mouthparts. This is when the digestion process is start and in doing this
the digestion process is started. Wolf spiders sometimes hunt for nutrition by
feeding off of insect carcasses. This is not as common but is known to be one way
for the wolf spider to get nutrients.
Spiders have a narrow stomach that can only cope with liquid food, they have
two sets of filters to keep solids out. They use one of two different systems of
external digestion. Some spiders pump digestive enzymes from the stomach into
the prey and then suck the liquefied tissues of the prey into the stomach, this
eventually leaves behind the empty husk of the prey. Other spiders grind there
prey to pulp.
A hemocoel is a cavity that is throughout the length of the body, this is where the blood
flows. The heart is a tube in the upper body, there are non returning valves that allow the
blood to enter the heart from the hemocoel but it prevents it from leaving before it reaches
the front end. Blood is released from the hemocoel by one artery. Wolf spiders have open
circulatory systems. The blood of many spiders contains respiratory pigment, and
hemocyanin to make oxygen and transport it.
Wolf spiders have a one way digestive system and a separate mouth, anus and
coelom. Waste is released from the anus. Spiders use there Malipighiam tubules for
excretion, these organs are like the human kidneys. The tubules create an acid
solution that helps make the wastes pass out of the body.
Locomotion in spiders involves muscular flexion and hydraulic extension. Normal walking
for a spider requires prosomal pressures. High-pressure circulatory system is used for a
spider's locomotion. Spiders have seven leg segments, and their movements are controlled
by muscles and by pressure changes in the body's circulatory fluid. Spiders use muscles to
retract their legs, but they lack extensor muscles. Spiders extend their legs by body-fluid
pressure. When spiders do not receive enough water to refresh their body fluids, their legs
fold up and they are unable to extend them.
The central nervous system of a spider is in the cephalothorax. This includes the brain
which is connected to the gandlion, which is a large group of nerve cells. Nerve fibers
run through the whole body, these fibers control the activities of the body.
The male spider has to track down a female spider. The males perform a
courtship ritual prior to mating, which involves complex leg and palp
signaling to the female. The female Wolf spider has an egg sac of white
papery silk. When the spiderlings hatch, they are carried around on the
females back until they are ready to leave their mother.
Spiders evolved from crab-like chelicerate ancestors. There are spider species within the
diverse phylum of arthropods.
Their shell around their body called an exoskeleton protects them from birds and other
animals from attacking them. They also adapt by eating other animals. Some build
burrows that are either opened or have a trap door.
There are over 37,500 different species of spiders. They are one of the most diverse
groups.
Wolf spiders live in a variety of different places . This includes, wet costal forests,
suburban gardens, and woodlands. They live in both the coastal and inland. They are
mostly found in the United States, Canada, Africa and England. Wolf Spiders do not make
webs, they make tube like barriers and live under rocks. They also will construct turrets
and cover the holes with leaves or pebbles to protect against flooding when it rains.
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