"Animal Movement" Animal Movement and Behavior PPT Courseware 6

Description

"Animal Movement" Animal Movement and Behavior PPT Courseware 6

The "arm" on the stand

The bracket is composed of "arms" and is an important structure on the bracket.

The components of the motion system - power unit

Mechanical power comes from electric motors or internal combustion engines.

The "fulcrum" on the stand

There is a connecting fulcrum between the "arm" and the "arm" so that the "arm" can move.

Discussion: What is the significance of the movement of joints to bones?

Ensure the firmness of the connection between bones

Improve movement flexibility

Relationship between bones, joints and muscles

Location: Tendons can go around joints and connect to different bones

Function: Can pull adjacent bones to produce movement

discuss

1. Which parts of the large crane are equivalent to the joints of the animal body?

2. In addition to mammals, do the bones of other vertebrates also have joints?

3. Earthworms have muscles but no bones. Is this a reason why they cannot move quickly?

4. Which parts of the human body have joints? Which joints are most likely to be injured when playing sports? How should it be protected?

generation of movement

When skeletal muscles contract under stimulation from nerves, they pull the bones around the joints, causing the body to move. However, skeletal muscles can only contract and pull the bones but cannot push them apart. Therefore, the muscles connected to the bones are always moved by two groups of muscles in cooperation with each other.

think:

Can actions be completed with only the motor system and nervous system?

Which systems provide the energy required for exercise?

Thinking questions

※ The structures that make up the mammalian locomotor system are:

A.Skeletal muscle B.Skeleton C.Skeletal muscle and bone D.Joint

※ The joint is both strong and flexible. What has nothing to do with this functional feature is:

A. The surface of the joint head and socket is covered with a layer of smooth cartilage

B. There is synovial fluid secreted by the joint capsule in the joint cavity.

C. The joint capsule and external ligaments have a certain degree of stretchability

D. The muscles around the joint capsule can contract

Some people compare muscles to the ropes that pull a car, because the ropes can only pull forward but not push back. If you let the car go backwards, you need to tie another rope behind the car. Do you think this metaphor makes sense? Tell us your reasons.

There is some truth to the metaphor.

Skeletal muscles can only contract and pull the bones but cannot push them apart. Therefore, the muscles connected to the bones are always moved by two groups of muscles in cooperation with each other.

Based on what we learned about mammal locomotion in this section, guess whether both ends of the bird's pectoral muscles are attached to the sternum? what is the reason?

Both ends of the bird's pectoral muscles do not attach to the sternum.

If both ends of a muscle are attached to the same bone, it has no significance for movement.

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Update Time: 2024-11-02

This template belongs to biology courseware People's Education Edition Biology for Grade 8, Volume 1 industry PPT template

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