Answer:
Explanation:
En los metazoos más complejos la homeostasis se mantiene por las actividades coordinadas de los sistemas circulatorio, nervioso y endocrino. Intervienen órganos que sirven de intercambio con el medio externo, los riñones, los pulmones o las branquias el tubo digestivo y la piel.
Answer is B. Porifera
Members of the phylum porifera includes animals which lack tissues. These animals are also called sponges. These are the simplest multicellular animals. Even though they are multicellular, they do not have any tissues or organs. They have cellular level of body organization. Sponges are aquatic animals and water plays a major role in the feeding, exchange of gases and as well as excretion.
I believe it is the sagittal plane
