Muscles are tissues that are specialized for contractions.
The Iris.
Diastolic and systolic is when your heart contracts and relaxes.
When the bicep contracts, the tricep relaxes. These pair of muscles are known as antagonists which means as one contracts, the other relaxes and vice versa.
heart
muscles
Lungs do not contain muscle tissue. air enters your lungs when the muscular diaphragm contracts, pulling your ribs up and out. The diaphragm relaxes when you exhale.
When lowering arm biceps relax and triceps contracts. When one contracts the other relaxes when you move it forward and downward.
Smooth muscles
It Contracts
It relaxes
Cardiac muscle tissue is the tissue that makes up the bulk of your heart and when it contracts it will squeeze blood to your lungs through the pulmonary circuit, and to the rest your body through the systemic circuit.
The heart