Small forearm bone is radius and main forearm bone is Ulna.
Humerus is upper arm bone.
Metacarpal bones are found in hand numbering 5.
Phalanges are small bones present in fingers also called digits
These are 14 in number.
Each leg is composed of 29 bones.
Tarsal bone is also known as the anklebone. These are seven in number.
Phalanges are toe bones numbering 14.
Vertebrae are 33 in number. Vertebral column covers spinal cord and protects it from injury.
Clavicle bones are also known as collarbones. These are two bones.
Scapula is called shoulder bones.
Sternum is called chest bone.
Patella acts like a kneecap and protects the knee joint.
Tibia is the main large bone of the lower leg also known as calf bone.
Fibula is the smaller part of lower leg.
Femur bears the weight of the body. It is in upper leg.
Muscles are composed of threadlike protein structure called my ofibril.
The cardiac muscle continues to contract rhythmically even when it is disconnected from the nervous system.
Trapizius muscle is responsible for movement of shoulder.
Sternocleidomastoid muscle is the longest muscle of the body
It bends head and neck.
Brachialis anticus muscle is responsible for bending forearm to the upper arm.
Heart is enclosed in a tough membrane called Pericardium.
There are four chambers of heart.
Heart is surrounded by a fluid called as pericardial fluid.
The weight of the heart in females is 25% lesser than in males
Excitability and contractility of the heart id due to the presence of myofibrils of actin and myosin.
Purkinjee fibres are tissues of heart.
S.A Node and A.V Node are special conducting tissues of the heart.
S.A. Node was discovered by Keith and Flack in 1907.
A.V Node functions as Pacemaker.
Right atrium receives deoxygenated blood from body collected by Superior Vena Cava from head and upper parts while from the lower parts by inferior vena cava.
Right atrium opens into right ventricle through right atrioventricular aperture guarded by bicuspid valve allowing one-way flow of blood.
When right ventricle contracts, the blood is pushed by the way of pulmonary arteries to the lungs for oxygenation.
The left atrium is that chamber which receives the oxygenated blood from lungs by pulmonary veins.
Left atrium opens into left ventricle from there blood is pumped into aorta, which distributes blood to body.
Cardiac cycle consists of three events- Auricular Systole,
Ventricular Systole and Diastole.
Each cardiac cycle takes 0.8 seconds.
Aorta is the largest vessel of the body.
The biggest artery is aorta with a diameter of one inch.
