Animal bodies
What Supports and Protects Animal Bodies
All of their bodies are supported by skeletons, which have similar functions. A skeleton is a framework that shapes and supports an animal, protested its internal organs, and allows it to move in its environment
All of their bodies are supported by skeletons, which have similar functions. A skeleton is a framework that shapes and supports an animal, protested its internal organs, and allows it to move in its environment
Types of skeletons
Most animals have one there types of skeletons: skeletons without hard parts , exoskeletons and endoskeleton. An exoskeleton is hard outer covering,while an endoskeleton is a framework inside the body.
Skeletons With Hard Parts
Have you ever seen blogs that looks like clear gelatin washes up on beach sand? These shape because of their skelton. First, exoskeletons have no cells, so they cannot grow the way organisms grow. The exoskeleton make and other skeleton that process is called molting.
Endoskeleton
Sharks and some other fishes have endoskeleton made of cartilage, a tissue than bone. The endoskeletons of most other vertebrates are made of mostly bone with some cartilage. Bone and cartilage contain living cells. As results a vertebrate endoskeleton grow.
Joints
A joint is a place where two or more parts of skeleton meet. The way the parts are held together in joint determinates how the joint can move.
Muscles
Muscles help animals move their body parts.
Have you ever seen blogs that looks like clear gelatin washes up on beach sand? These shape because of their skelton. First, exoskeletons have no cells, so they cannot grow the way organisms grow. The exoskeleton make and other skeleton that process is called molting.
Endoskeleton
Sharks and some other fishes have endoskeleton made of cartilage, a tissue than bone. The endoskeletons of most other vertebrates are made of mostly bone with some cartilage. Bone and cartilage contain living cells. As results a vertebrate endoskeleton grow.
Joints
A joint is a place where two or more parts of skeleton meet. The way the parts are held together in joint determinates how the joint can move.
Muscles
Muscles help animals move their body parts.
The nervous system
A nervous system receives information from the environment and coordinates a response.
A nervous system system allows animals to detect signals in their environments, process the signals, and react to them. A stimulus is a signal that causes an animal to react in some way. A response is an animal's reaction to a stimulus.
A nervous system system allows animals to detect signals in their environments, process the signals, and react to them. A stimulus is a signal that causes an animal to react in some way. A response is an animal's reaction to a stimulus.
Types of cells
A neuron is a nerve cell with a unique structure for receiving and passing on information. Sensory neurons are nerve cells that detect stimuli. Interneurons are nerve cells that pass information between neurons. Motor neurons are nerve cells that carry response information to muscles and other organs.
Types of Nervous Systems
The simple nervous systems are a netlike arrangement of neurons throughout the body. The most complex systems have a nerve cord and a brain. A cnidarian`s nervous system consists of neurons arranged like a net. A brain is organized grouping of neurons in the head of an animal with bilateral symmetry.
Animal movement
An animal moves about when its nervous system, muscular system,and skeletal system work together to make movement happen.First, an animal’s nervous system receives a signal from the environment. Second, its nervous system processes the signal.Finally, its nervous system signals the muscles, which contract, causing the skeleton to move.Animals that live in water, on land, or in the air have different adaptation for movement.
Movement in water
For example, sea stars and other echinoderms have a water vascular system, amp system of fluid filled tubes
Fine for balance
These fins stay upright in the water.
Tail fin
The tail fin, along with the fish’s side muscles, provide swimming power.
Swim bladder
A swim bladder is an internal, gas-filled sac. By adjusting the gas lever, a fish can stay at a certain depth without using much energy.
Water vascular system
A sea star has tube feet on the under sides of its arms. They are part of the water vascular system and grip surfaces with suction.
Webbed feet
Webbed feet help a frog push itself through water.
Streamlined bodies
A penguin has a streamlined body and wings
Jet propulsion
A squid moves by jet propulsion. It uses muscles to pull water into its body, and then shoots it out through a narrow tube. This shoots the quid in the opposite direction
Fine for balance
These fins stay upright in the water.
Tail fin
The tail fin, along with the fish’s side muscles, provide swimming power.
Swim bladder
A swim bladder is an internal, gas-filled sac. By adjusting the gas lever, a fish can stay at a certain depth without using much energy.
Water vascular system
A sea star has tube feet on the under sides of its arms. They are part of the water vascular system and grip surfaces with suction.
Webbed feet
Webbed feet help a frog push itself through water.
Streamlined bodies
A penguin has a streamlined body and wings
Jet propulsion
A squid moves by jet propulsion. It uses muscles to pull water into its body, and then shoots it out through a narrow tube. This shoots the quid in the opposite direction
Moving in land
Body muscles
This sidewinding adder snake uses its muscles to lift loops of its body off the hot desert sand as it moves along
Foot and mucus
To move, a sail contracts its muscular foot. The foot oozes slippery mucus, which makes it easier for the snail to move along.
This sidewinding adder snake uses its muscles to lift loops of its body off the hot desert sand as it moves along
Foot and mucus
To move, a sail contracts its muscular foot. The foot oozes slippery mucus, which makes it easier for the snail to move along.