4 A floor turtle can use the following instructions:
INSTRUCTION
MEANING
FORWARD n
Move n mm forward
BACKWARD n
Move n mm backward
LEFT
Turn left t degrees
RIGHT
Turn right t degrees
PENUP
Lift the pen
PENDOWN
Lower the pen
REPEAT n
Repeat the following instructions n times
END REPEAT
Finish the REPEAT loop​

A floor turtle can use the following instructions: INSTRUCTION FORWARD n BACKWARD LEFT RIGHT PENUP PENDOWN REPEAT MEANING Move n mm forward Move n mm backward Turn left t degrees Turn right t degrees Lift the pen Lower the pen Repeat the following instructions n times Finish the REPEAT loop END REPEAT 45° 100 mm start Complete the set of instructions to draw this shape by filling in the blank lines. PEN DOWN 90 REPEAT FORWARD LEFT 6 A student wishes to use floor turtle to draw this shape: Name and explain the meaning of three instructions that the turtle graphics software would need to contain in order to draw the shape. 20 40 10 45 85 Instruction 1 Meaning Instruction 2 Meaning Instruction 3 Meaning [6] E.

the oxygenated blood then leaves the lungs through pulmonary veins, which return it to the left heart, completing the pulmonary cycle. this blood then enters the left atrium, which pumps it through the mitral valve into the left ventricle. from the left ventricle, the blood passes through the aortic valve to the aorta.

deoxygenated blood leaves through the right ventricle through the pulmonary artery. from the right atrium, the blood is pumped through the tricuspid valve (or right atrioventricular valve), into the right ventricle.