Nucleus. The nucleus contains all the genetic material in a cell. This genetic information is called deoxyribonucleic acid (DNA). DNA contains all the instructions for making proteins, which control all of the body's activities.
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Muscular to pump blood over long distance;
- Myogenic cardiac muscles which contract and relax rhythmically without fatigue; hence heart continues pumping;
- Cardiac muscle fibres interconnected to form a network of fibre to ensure rapid and uniform spread of excitation throughout the walls of the heart;
- Heart divided into 4 chambers which are hollow to accommodate more blood;
- Ventricles have thicker walls than auricles to generate higher pressure to drive blood over long
distance into more elaborate circulation/to the lungs and to all body tissues
Answer:
Van Helmont thought he proved that plants obtain nutrients from water rather than soil.
Answer:
Let me count a few of the ways…
- Plants do not take life of any kind to sustain their own lives.
- Plants harvest atmospheric carbon dioxide (a waste product), water and sunlight (both ubiquitous and freely available) to produce within themselves the food which nourishes them.
- Plants are born and die in the same place.
- Plants have yet to start a war, perpetrate a genocide, or kill members of their own species over disagreements about mere ideas.
- When plants die, they do not entertain silly notions of a Better Place, somewhere beyond the stars.
