Pectoral muscles

High school (ages 12+)
Human Body

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/pectoral-muscles

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the pectoralis major origin?Clavicle, sternum, and cartilages of the upper six or seven ribs
2. What is the pectoralis minor insertion?Coracoid process of the scapula
3. Why do we need the pectoralis minor?The pectoralis minor keeps your shoulder blade steady so your arm can move smoothly. It pulls the blade down and forward.
4. How do pectoral muscles help with breathing?The muscles around your chest, like the intercostal muscles, lift and lower your ribs when you breathe. This expands and contracts your chest so air can flow in and out.

Glenohumeral Joint: The ball-and-socket joint formed by the humerus and the scapula, commonly known as the shoulder joint.
Brachiation: A form of arboreal locomotion in which primates swing from branch to branch using their arms.
Kinetic Chain: A series of interconnected joints and segments that transfer energy during movement.