Thoracic cavity or chest cavity consists of a thoracic wall that protects the heart and lungs, which are the important organs of our body. Diaphragm, that separates the thoracic cavity from the abdominal cavity, forms the floor of the chest cavity and helps in the respiration process.
Occipitofrontalis muscle.
Temporoparietalis muscle.
Procerus muscle.
Nasalis muscle.
Depressor septi nasi muscle.
Orbicularis oculi muscle.
Corrugator supercilii muscle.
Depressor supercilii muscle.
The groups of plants are pteridophytes (ferns), Bryophytes (mosses) and lichens.
Algae is not a good answer since they live in an aquatic environment.
Plants without flowers (ferns, mosses, lichens) have neither flowers nor seeds. They can colonize various environments, terrestrial or aquatic. Ferns and mosses for example settle between the stones of an old well. The reproduction of plants without flowers is mainly due to spores.
Answer:
gas: because oxygen is gas
