Question

1. what is formed of two or more types of body tissue and performs one or more specific functions? system organ mitochondria lysosome 18. a pacemaker usually generates electrical stimuli to the heart muscle with: fixed impulses only fixed and/or alternate impulses alternate impulses only none of the above

Explanation:

1. An organ is made up of two or more types of body tissue and has one or more specific functions. Systems are made of multiple organs. Mitochondria are cell - organelles for energy production and lysosomes are for waste breakdown.
2. A pacemaker can generate fixed and/or alternate electrical impulses to regulate the heartbeat.

Answer:

1. organ
2. fixed and/or alternate impulses