pulmonary artery

bronchus

bronchiole

alveolus

pulmonary vein

intercallated disk of cardiac muscle

melanocyte in stratified squamous epithelium

dense fibrous regular connective tissue

Produces and secretes sweat through the sweat ducts in order to cool the blood by heat transfer.

Secretes the neurotransmitter acetylcholine (Ach) onto skeletal muscle cells.

Produces and secretes collagen fibers.

Senses input information.

Generating an action potential.

Absorbs mechanical shocks and sticks different tissues together.

Propagates nervous signals along large distances within neurons.

Transmit the nervous signal from one neuron to another by secreting neurotransmitters.

smooth muscle

skeletal muscle

cardiac muscle

Conduct nervous signals.

Insulate the axon to increase the speed of propagation.

Form the blood brain barrier.

Produce cerebrospinal fluid (CSF) for perfusion.

autonomic

somatic