Circulatory system
Internal enviroment: Cells need to live in an internal enviroment that provides nutrients and alow them to release waste substances
The internal enviroment is form of interstitial plasma that fills the space between cells and it had to be renewed continiouslly to obtein new nutrients and to release the acomulated waste
Blood composition
Blood cells: made up of water whith minerals, nutrients, amino acids, waste products, proteins and dissolved hormones
Blood cells: the three tipes of blood cells
Eurythrocytes or blood cells: there are 5 million per mm3 they are disk-shaped and dont have nucleous They transport oxygen from the pulmonary alveoly
Thrombocytes or platelets: there are 300000 per mm3 of blood and they allow the coagullation of blood
Leukocytes or white blood cells: There are 7000 per mm3 of blood there are three tipes
monocytes
glanulocytes
Lymphocytes
eosinophils
basophils
Neutrophils
Blood – a fluid connective tissue with matrix (plasma) and formed elements (cells) involved in:
Blood groups and Rh factor:
Groups are determinated by certain proteins in the plasma.
AntigenB, AntibodiesA
AntigensAB and no antibodies
Type A: AntigenA and antibodiesB
Type 0 It doesnt have antigens and antibodies
functions of blood
It contribute in the regulation of body temperature
it fight against infections
It transpot nutrients and oxygen to all the cells and collected waste products it also carries hormones
Blood circulaion: multicellular organism need blood to reach all the organs.
Vertebrates blood travels inside blood vessels
Capillaries allows the entry and the exit of molecules
Veins carry blood from tissues to the heart
Arteries carry blood from the heart to the other organs.
THE HEART is a hollow muscular organ. It is divided into two parts, the left and the right, completely separate
Heartbeat: The heartbeat is a constant movement that pumps blood from the veins into the atriums
The heart beat refers to the number of times the heart beats per unit of time
how is it
Diastole estudiar en el libro
Arial systole: estudiar en el libro
ventricolar systoleestuiar en el libro
Blood pressure the pressure applied by blood on the artery walls. During the ventricular systole, the aorta dilates. This process produces a wave, called a pulse.
blood circuits
systemic circuit: estudiar en el libro
pulmonary circuit estudiar en el libro
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