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The skin is the soft outer covering of our body, its three layers are the epidermis, the dermis and the hypodermis.
skin, first line of defense, epidermis, dermis, hypodermis, cutaneous sense, stratified epithelium, Keratinized epithelium, sensory organ, integument, sweat gland, sebaceous gland, hair bulb, keratinous layer, hair, stimulus, signal, nervous system, central nervous system, perception, receptor, pain, heat, human, biology
Connective tissues include loose and dense connective tissues, adipose tissue, blood, tendon and bone tissue.
Surface epithelia cover the external and internal surfaces of the body
Our body´s internal support structure to which skeletal muscles are attached.
Adrenaline, also known as epinephrine, is a hormone produced in our bodies in stressful situations and plays an important role in the fight-or-flight response.
This animation introduces the most important systems of the human body.
The three types of muscle found in the human body are the smooth, the striated and the cardiac muscle.
Neurons are cells specialized for transmitting electric signals.
Olfactory receptors produce electric signals when stimulated by odors.
This animation demonstrates the fine molecular structure and mechanism of muscles.
Taste receptors convert chemical stimuli into electric signals.
The curvature of the lens of the eye changes when we look at a distant or at a near object, to ensure a sharp image.
Organs that detect signals of the environment or of the body and transmit them to the brain as nerve impulses.
The withdrawal reflex is a spinal reflex that ensures moving away from potentially damaging stimuli.
This scene presents the basic components of the human body.
This animation introduces the most important organ systems of the human body.
This animation demonstrates the parts of the head, the torso and the limbs.
The reflex triggered by the stretching of the thigh extensor muscle is the patellar reflex.
The animation demonstrates the most important types of feathers and their fine structure.