Baron Zemo's hood was permanently affixed to his head due to immersion in Adhesive X. Zemo could see through the hood's eye holes, and it was thin enough to allow him to hear normally. The hood had no openings for the nose or mouth, but was porous enough to allow Zemo to breathe. He could no longer eat, and for the rest of his life, Zemo had to take nourishment intravenously.
Baron Heinrich Zemo was born in 1900, the 12th Baron Zemo. He lived most of his life at Castle Zemo in Zeulniz, Germany. He received the very best education, excelling in science. Becoming one of the leading scientific minds in Europe.
Zemo joined the Nazi Party early in its existence. It was during this time that he met and married a woman named Hilda together they had a son
Helmut. He was at first a loving husband and father, but this would change overtime.
On the outbreak of WWII, Zemo quickly became one of the Nazis' top scientists and the most wanted Axis agent.
One of his first public activities occurred when Allied Sergeant Nick Fury and his Howling Commandos invaded Zemo's castle to destroy Zemo's "death ray" in 1942. Zemo was defeated, but managed to escape. However, the defeat left him vilified throughout the world, and even in Germany, where Zemo took his wife and son, Helmut, into hiding. Zemo began wearing a cowl to disguise himself.
Also in 1942 he acquired a sample of Vibranium that had accidentally been transported to the past from the Baxter Building. The Fantastic Four traveled back in time and teamed up with the Invaders who defeated him and returned the sample to its proper time.
Zemo was working on his invention known as Adhesive X when the hero Captain America invaded his laboratories. In the course of destroying the only supply, the adhesive covered Zemo's cowled head, which became permanently affixed. As a result, Zemo became consumed with a violent, insane hatred for Captain America and mankind in general.
Captain America and Bucky helps Baroness Hilda Zemo find Baron Zemo in 1943. He has built the Medusa Effect , which is a massive weapon capable of decimating the United States Air Force. 
In 1943 Zemo faced the hero Citizen V in Poland, and strangled him to death with his own hands in order to break the spirits of his followers, the V-Battalion.
Zemo led many missions of sabotage and terror against the Allies, often clashing with Captain America.
In 1945, Zemo was issued orders from the Red Skull to sabotage an experimental drone that was planned to be launched from an island on the English Channel. Captain America and his sidekick Bucky tried to stop such plan, but failed. Zemo launched the plane, and when the heroes chased after it, Bucky was killed when a bomb Zemo had placed aboard the plane exploded, and Captain America was thrown into the ocean which led him into a period of suspended animation.
Captain America and the Avengers travelled back in time using Doctor Doom's Time Machine. They witnessed Baron Zemo's battle with Cap and Bucky, but were unable to change anything.
Soon after, Zemo left Germany (and his family) in the final days of the war, hiding away in a base he had constructed in the South American jungle.
While his Masters battled the Avengers, Zemo had captured Rick Jones, then acting as Cap's partner. Cap and Zemo duelled in South America. Blinded by the glare from his opponent's shield, Zemo fired his death ray wildly and died in the ensuing rock slide. Meanwhile, the remaining members were defeated by the Avengers after Thor transported them to another dimension so their battle would not destroy the city of New York.
Erik Josten, an agent for Baron Zemo before he died, returned to the machinery used to create Wonder Man. There he finds the Enchantress, who tells him she will use the machine to make him strong too. He agrees and is given the name "Power Man". 
Baron Helmut Zemo, the son of Heinrich took over his father's mantle and tried to get revenge on Captain America.
When Deadpool and Bullseye first crossed swords they battled in Baron Zemo's tomb. During the fight Bullseye attempted to strangle Deadpool with Zemo's large intestines. 
Slowed Aging Thanks to his special Compund X, Zemo's aging has been slowed by a significant amount, bordering on immortality. This has allowed him to retain his youthful vigor, vitality, and appearance well into his old chronological age. 
Scientific Genius: Baron Zemo was a brilliant scientific genius who made great advances in the field of laser technology, the development of adhesives, genetic manipulation, and the creation of androids. It has been said that Zemo's genius enabled him to construct technology centuries in advance of conventional science.
Fighting Skills: Before and during his decades in South America, Zemo trained himself in various forms of unarmed combat, including karate. He remained a formidable master of these skills until the end of his life.
In his prime Baron Zemo possessed the normal human strength of a man of his age, height, and build who engaged in Intensive regular exercise. His Compound X serum enabled him to retain his strength and physical vitality into his old age.
Mask permanently bonded to his Face: Baron Zemo's hood was permanently affixed to his head due to immersion in Adhesive X. Zemo could see through the hood's eye holes, and it was thin enough to allow him to hear normally. The hood had no openings for the nose or mouth, but was porous enough to allow Zemo to breathe. He could no longer eat, and for the rest of his life, Zemo had to take nourishment intravenously.
Particle X: Zemo's "Particle X" was a specialized form of energy that would instantly disable any form of machinery or anything mechanical.
Adhesive X: The most infamous of Zemo's weapons was "Adhesive X", and adhesive which can only be removed by means of a chemical formulated by the Trapster.
Formula X: A special gas that could instantly tranquillize anyone affected. Its victims could be affected not only through inhaling it, but also by having it enter through the pores in their skin.
Special Headband: A headband that blocked against telepathic attack and concealed technology that allowed him to mentally operate some of his creations.
Disintegrator Gun: Zemo carried a disintegrator gun as a hand weapon. The ray emitted from this gun did not directly attack its target through heat, impact, or force, but would loosen its molecular bonds, disintegrating it instantly.