I’d choose number (2)
step by step explanation:
Answer:
1) Pacemaker impulse generation.
2)AV node impulse conduction
3) AV bundle impulse conduction.
4) Bundle branches conduction.
5) Purkinjie fibres impulse conduction.
Explanation:
The cardiac conduction has following components.
1)SA node is the heart pacemaker in the right upper quadrant of heart. It generates electrical impulses and these impulses then move through atria and AV node to the Purkinjie fibres.
2) The impulses reach AV node. It controls heart rate. It serves as electrical relay station which slows the electrical current sent by SA node before the signals has passed to ventricles.
3) AV bundle is continuation is AV node and it transmits impulse from AV node to the Purkinjie fibres.
4) Electricle impulses from bundle of his passes through bundle branches (right and left ) to Purkinjie fibres.
5)Purkinjie fibres take the impulses from the bundle branches to the myocardium of ventricles.
Axial consists if skull, vertebrae and rubs. Appendicular consists of limbs and girdles.
<span>Photo autotrophs carry out photosynthesis in a manner similar to that of plants! The process by which prokaryotes change nitrogen gas to a form that plants can used is called Nitrogen fixation! Prokaryotes that break down dead organisms in an ecosystem are called Decomposers! </span>
Answer:
he Euglena is a large genus with different species of unicellular protists. They have both plant and animal features. They are all motile by the flagella like animals.
Most of them have chloroplasts similar to algae.
Explanation: