Answer:
El sistema nervioso consiste en el cerebro, la médula espinal, los órganos sensoriales y todos los nervios que conectan estos órganos con el resto del cuerpo. Juntos, estos órganos son responsables del control del cuerpo y la comunicación entre sus partes.
Explanation:
Haha but i don't want keep yourself
Bacteria to amphibians. amphibians started to turn to fish and some started walking to land. They started laying eggs and turning into reptiles. those reptiles started growing hair turning them into four legged mammals. the mammals then turned to primates which evolved into us.
The heart must beat faster during exersise because by increasing the heart rate the body is able to increase cardiac output and deliver the necessary blood flow to the mucles
Answer:
No. Instead they contain enzymes.
