Download agustiniano ciudad salitre school science area final workshop ii term

AGUSTINIANO CIUDAD SALITRE SCHOOL
SCIENCE AREA
FINAL WORKSHOP II TERM
NAME: ____________________________________________________________________________ GROUP: _____
CIRCULATION IN HUMANS
The circulatory system is the route by which the cells in the body get the oxygen and nutrients they need.
I.
Reading the conceptual map and complete the paragraph:
The Circulatory System is composed by _______________ major parts: _______________, _______________ and
_______________ _______________. The heart is composed by _______________ and _______________: chambers are divided in
two _______________ and two _______________. Blood is actually a tissue made up of a variety of cells, each having a different job.
it has a liquid part and a solid part. The liquid part is the _______________and it has _______________ and _______________; the
solid part is composed by _______________ cells: _______________ blood cells (erythrocytes) carry oxygen; _______________
blood cells (leukocytes) ward off infection and _______________ (thrombocytes) help the blood to clot. There are three types of blood
vessels: _______________, _______________ and _______________.
The Circulatory System has two functions: _______________ nutrients, oxygen and hormones and _______________
_______________ wastes and carbon dioxide. It follows the functions through two types of circulation: _______________ circuit or
lesser and _______________ circuit or greater.
Some of the cardiovascular diseases are _______________, _______________and _______________ _______________.
CIRCULATION INTO THE HEART
The heart is a muscle that pumps oxygenated blood and nutrients throughout the body. Mammals have four-chambered hearts and
double circulation. Two of those chambers are receiving chambers called the right and left atrium. The other two chambers are
pumping chambers called the right and left ventricle. The left side of the heart handles only oxygenated blood, and the right side
receives and pumps only deoxygenated blood. With no mixing of the two kinds of blood, and with a double circulation that restores
pressure after blood has passed through the lung capillaries, delivery of oxygen to all parts of the body for cellular respiration is
enhanced. Blood flow through the heart starts when the right atrium takes the blood that flows in through the superior or inferior vena
cava. The right atrium then fills with blood and pressure causes tricuspid valve to open. The blood then goes into the right ventricle
where it contracts the blood into the pulmonary arteries. These arteries lead to the lungs where blood is then oxygenated. The
oxygenated blood then flows from the lungs to the left atrium through the pulmonary veins. Due to pressure the valve, which leads to
the left ventricle, opens up and pushes the blood into the left ventricle. The left ventricle then contracts and forces the blood through the
aorta, which provides the rest of the body with blood.
You can use this link to observe better the circulation process:
http://www.texasheart.org/ProjectHeart/Kids/Watch/Heart_Valves.cfm
Enjoy the song : https://www.youtube.com/watch?v=q0s-1MC1hcE
https://www.youtube.com/watch?v=KSbbDnbSEyM Circulatory System Rap (Pump it Up!)
Trace the path of blood from the right atrium to the aorta with arrows. Color the deoxygenated blood chambers/vessels blue and the
oxygenated blood chamber/vessels red.
CARDIAC CYCLE
The cardiac cycle is the sequence of events that occurs when the heart beats. There are two phases of the cardiac cycle. In
the diastole phase, the heart ventricles are relaxed and the heart fills with blood. In the systole phase, the ventricles contract and pump
blood to the arteries. One cardiac cycle is completed when the heart fills with blood and the blood is pumped out of the heart.
The events of the cardiac cycle described below trace the path of the blood as it enters the heart, is pumped to the lungs, travels back
to the heart and is pumped out to the rest of the body. It is important to note that the events that occur in the first and second diastole
phases actually happen at the same time. The same is also true for the events of the first and second systole phases.
SYSTEMIC AND PULMONARY CIRCULATION
The cardiovascular system is composed of two circulatory paths: pulmonary circulation, the circuit through the lungs where blood is
oxygenated, and systemic circulation, the circuit through the rest of the body to provide oxygenated blood.
In the pulmonary circulation, blood travels through capillaries on the alveoli, air sacs in the lungs which allow for gas exchange.
As blood flows through circulation, the size of the vessel decreases from artery/vein, to arteriole/venule, and finally to capillaries, the
smallest vessels for gas and nutrient exchange.
The systemic circulation is the part of blood circulation that carries oxygenated blood away from the heart, to the body, and returns
deoxygenated blood back to the heart.
It is a double circulatory system. It comprises two separate circuits and blood passes through the heart twice.
The pulmonary circuit carries blood to the lungs to be oxygenated and then back to the heart. In the lungs, carbon dioxide is removed
from the blood, and oxygen taken up by the haemoglobin in the red blood cells.
The systemic circuit carries blood around the body to deliver the oxygen and returns de-oxygenated blood to the heart. Blood also
carries nutrients and waste.
Exercise: look for the words related with Circulatory System
ANEURYSM
ARTERIES
ATRIUM
BLOOD
CARBONDIOXIDE
CHAMBERS
DIASTOLE
DISTRIBUTION
ERYTHROCYTES
LEUKOCYTES
OXYGEN
PLASMA
PULMONARY
PUMPS
SYSTEMIC
THROMBOCYTES
TRANSPORT
VALVES
VENTRICLE
VESSELS