Muscle tissues

Muscle tissues

The three types of muscle found in the human body are the smooth, the striated and the cardiac muscle.

Biologija

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Susiję elementai

Vaizdai

Susiję elementai

Human muscles

Skeletal muscles form the active part of the locomotor system: they move the bones they are attached to.

Structure of skeletal muscles

This animation demonstrates the fine molecular structure and mechanism of muscles.

Muscles of the upper arm

The arms are moved by flexor and extensor muscles.

Patellar reflex

The reflex triggered by the stretching of the thigh extensor muscle is the patellar reflex.

The withdrawal reflex

The withdrawal reflex is a spinal reflex that ensures moving away from potentially damaging stimuli.

Anatomy of the spinal cord

The spinal cord is the part of the central nervous system running inside the spinal column from which spinal nerves branch out.

Animal and plant cells, cellular organelles

Eukaryotic cells contain a number of organelles.

Bones of the lower limbs

Bones of the lower limbs are connected to the trunk by the pelvis.

Bones of the upper limbs

Bones of the upper limbs form the pectoral girdle and the arms.

Connective tissues

Connective tissues include loose and dense connective tissues, adipose tissue, blood, tendon and bone tissue.

Layers of the skin; cutaneous senses

The skin is the soft outer covering of our body, its three layers are the epidermis, the dermis and the hypodermis.

Levels of biological organisation

This animation presents levels of biological organisation from the level of the individual organism to the level of cells.

Neurons, nervous tissue

Neurons are cells specialised for transmitting electric signals.

The electrical conduction system of the heart

The heart generates the electrical impulses necessary for its own operation. The graphic representation of the electrical activity of the heart is the...

The heart

The heart is the central pump of the cardiovascular system beating several billion times over our lifetime.

The human blood

Human blood consists of blood cells and plasma.

Types of surface epithelium

Surface epithelia cover the external and internal surfaces of the body

Heart attack

The cause of a heart attack is the blockage of a coronary artery. It is one the most common causes of death.

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