Epithelial, muscle, connective, nerve and blood.
Phospholipids will form a bilayer in water because they contain hydrophobic (Water fearing.. in this cause water "hating") tails and hydrophilic heads (water loving). So they form a bilayer to remove the tails from water likewise, this satisfies the hydrophilic heads because they are still exposed to water.
Answer:
chromatin network or chromosomes
Organ
The heart is a muscular organ that is part of the circulatory system.
