Human muscle system | Functions, Diagram, & Facts | Britannica
6 days ago · Human muscle system, the muscles of the human body that work the skeletal system, that are under voluntary control, and that are concerned with movement, posture, and …
Human body | Organs, Systems, Structure, Diagram, & Facts
Jan 19, 2026 · The human body Vintage anatomy charts of the human body showing the skeletal and muscle systems.
Human body systems | Muscle, Skeletal, Respiratory, Circulatory ...
Each of the major systems of the body is essential to the survival of the human organism, and each serves as a critical companion to the others. The muscle and skeletal systems, for …
Muscle | Systems, Types, Tissue, & Facts | Britannica
Dec 22, 2025 · This article consists of a comparative study of the muscle systems of various animals, including an explanation of the process of muscle contraction. For an account of the …
Human muscle system - Abdominal Muscles, Anatomy, Function
6 days ago · Human muscle system - Abdominal Muscles, Anatomy, Function: There are three muscular layers of the abdominal wall, with a fourth layer in the middle anterior region.
Human muscle system - Shoulder Muscles, Joints, Movements
Dec 29, 2025 · Although several of the muscles that move the hand have their origins in the forearm, there are many small muscles of the hand that have both their origin and their …
Human skeleton | Parts, Functions, Diagram, & Facts | Britannica
5 days ago · What are the primary functions of the human skeleton? The primary functions of the human skeleton are support, protection, and motion. Support is the most primitive and oldest …
Cardiac muscle | Definition, Function, & Structure | Britannica
Cardiac muscle possesses contractile units known as sarcomeres and exhibits rhythmic contractions. The rhythmic contractions are regulated by the sinoatrial node of the heart and …
Muscle System - Students | Britannica Kids | Homework Help
Explore the human muscle system with this interactive diagram.
Heart | Structure, Function, Diagram, Anatomy, & Facts | Britannica
Jan 21, 2026 · These contractions are stimulated by electrical impulses from a natural pacemaker, the sinoatrial, or S-A, node located in the muscle of the right atrium. An impulse from the S-A …