Which option is a main type of muscle tissue?(1 point)
Responses
skin
skin
spongy bone
spongy bone
blood vessels
blood vessels
cardiac
cardiac
Which list is an organ system?(1 point)
Responses
the liver, blood, and skin
the liver, blood, and skin
the heart, the stomach, and intestines
the heart, the stomach, and intestines
the liver, the bladder, and the heart
the liver, the bladder, and the heart
the heart, arteries, and veins
the heart, the stomach, and intestines
Which is most complex?(1 point)
Responses
organ system
organ system
tissues
tissues
organs
organs
cells