limb
Definition
A limb is a jointed appendage that projects from the trunk of an animal's body. Limbs are used for movement, grasping, and sensory perception. Humans have two upper limbs (arms) and two lower limbs (legs). Other animals have different types of limbs, such as wings, fins, and tails.
The bones of a limb are arranged in a series of joints that allow the limb to move in different directions. The muscles of a limb attach to the bones and contract to move the limb. The tendons are tough cords that connect the muscles to the bones.
The limbs of different animals are adapted for different types of movement. For example, the wings of birds are adapted for flying, the fins of fish are adapted for swimming, and the legs of horses are adapted for running.
Limbs are an important part of the animal body. They allow animals to move around, interact with their environment, and survive.
How can the word be used?
The monkey swung from limb to limb.
Different forms of the word
Noun: A limb is a part of an animal or plant that projects from the main body. In animals, limbs are typically used for locomotion, such as legs or arms. In plants, limbs are typically used for photosynthesis, such as leaves or branches.
Adjective: A limb can also be used as an adjective to describe something that is like a limb. For example, a limb-like appendage is an appendage that is similar to a limb.
Verb: To limb is to remove the limbs from something. For example, to limb a tree is to remove the branches from it.
Etymology
The word "limb" comes from the Old English word "limb", which also means "limb". It was first used in English in the 8th century.
The Old English word "limb" is thought to be derived from the Proto-Germanic word *limba, which also means "limb".
Question
What is a limb?
AQA Science Exam Question and Answer
Question:
Explain the role of limbs in vertebrate animals and how they contribute to their survival and functionality. Provide examples of different types of limb adaptations in vertebrates.
Answer:
Limbs in vertebrate animals play a crucial role in their mobility, interaction with the environment, and overall survival. They are specialised structures that have evolved to suit the specific needs of different species.
For example, mammals like humans have limbs adapted for both locomotion and manipulation. Our arms allow us to grasp objects and perform intricate tasks, while our legs facilitate walking and running. Birds have wings that are modified forelimbs adapted for flight. The structure of bird wings and the presence of feathers enable them to generate lift and control their movement in the air.
Aquatic vertebrates like dolphins and whales have evolved limbs into flippers, which aid in swimming and manoeuvring in the water. These adaptations have allowed them to thrive in their aquatic habitats.
Limbs can also be adapted for specialised functions, such as the prehensile tails of some primates used for grasping, the powerful hind limbs of kangaroos for hopping, and the forelimbs of bats transformed into wings for flying.